环境激素氰戊菊酯和有机锡对轮虫生活史特征的影响  

Effects of Fenvalerate and TBTC (EDCs) on life history characteristics of freshwater rotifer Brachionus calyciflorus

作　　者：朱玮阁[1] 李孙根[1] 吕林兰[1] 杨家新[1] 

机构地区：[1]南京师范大学生命科学学院,南京210046

出　　处：《湖泊科学》2009年第5期687-692,共6页Journal of Lake Sciences

基　　金：国家自然科学基金项目(30570260);江苏省自然科学基金项目(BK2007225)

摘　　要：采用单"克隆"培养和群体培养的方法,研究了具有环境雌激素效应药物氰戊菊酯(Fenvalerate)和雌性雄性化激素效应药物三丁基氯化锡(TBTC)对萼花臂尾轮虫(Brachionus calyciflorus)生命周期中各发育阶段的历时以及种群增长的影响.结果表明,氰戊菊酯和TBTC对萼花臂尾轮虫的生长发育和种群增长有明显的效应.氰戊菊酯使生殖期延长(200和1000μg/L),生殖后期缩短,平均寿命也缩短(除1000μg/L),总产卵量和种群增长率升高;而经TBTC处理生殖前期延长(1和5μg/L),生殖期和生殖后期缩短,平均寿命也缩短,总产卵量和种群增长率较对照组也有下降.批次携卵量也受到两种药物的影响.且萼花臂尾轮虫的总产卵量随着氰戊菊酯和TBTC的浓度呈曲线相关,氰戊菊酯:Y=-0.6745X2+6.6884X+5.855(R2=0.7027);TBTC:Y=0.2054X2-2.3178X+16.666(R2=0.6535).研究表明环境雌激素氰戊菊酯和雌性雄性化激素TBTC对萼花臂尾轮虫生活史特征影响表现出一定差异.Recent reports suggested that when certain contaminants may present in aquatic ecosystem at levels, it would disrupt endocrine functions of a variety of aquatic invertebrates. For this hypothesis, we sought to determine whether the estrogenic compound Fenvalerate and androgenic compound TBTC can individually inhibit the development and reproductive output of the freshwater rotifer Brachionus calyciflorus. The present study focused on the life history characteristics of B. calyciflorus under effects of different concentrations of Fenvalerate and TBTC. The result showed that Fenvalerate and TBTC had significant effects on the durations of different development stages of B. calyciflorus and the characterristics of its population growth. Treatment with Fenvalerate at the concentrations of 200 and 1000μg/L significantly lengthened the duration of reproductive period. However, the duration of pre-reproductive, post-reproductive periods and the lifespan were shortened. In treatment with 1 and 5μg/L TBTC, the number of eggs and population growth rate were also increased compared to the control, however, the pre-productive period was significantly lengthened, and the reproductive, post-reproductive periods and the lifespan were significantly shortened compared to the control. The total number of eggs and population growth rate were both decreased significantly when the rotifer was exposed to 0.001 and 1-5μg/L of the above contaminants, and the number of eggs was curve-related with the concentrations of Fenvalerate and TBTC （Fenvalerate： Y=-0.6745X^2＋6.6884X＋5.855（R^2=0.7027）; TBTC： Y=0.2054X^2-2.3178X＋16.666（R^2=0.6535））. Consequently, Fenvalerate and TBTC showed differently effects on the durations of different development stages of B. calyciflorus and the characterristics of its population growth.

关 键 词：萼花臂尾轮虫:氰戊菊酯 TBTC EDCS 生命周期 种群增长 

分 类 号：X174[环境科学与工程—环境科学]